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Modelling heat flow in a heat storage system with the use of the Finite Volume Method

Sobieski Wojciech

Journal of Applied Computer Science

2019

Vol. 27, nr 1

27--49

Non-stationary heat flow was analysed in a heat storage system comprising a flat multilayer structure with different parameters and thickness. Concrete was the heat storage material, and water was the transfer medium responsible for supplying and evacuating heat from the storage medium. It was assumed that the modelled heat storage system may be powered by a solar thermal collector. Data were collected over a period of 24 hours, and they were analysed separately for the heat accumulation phase and the heat recovery phase. Calculations were performed in a program developed by the author based on the Finite Volume Method (FVM). The main aim is to illustrate the basic features of the developed numerical code and to find effective methods for evaluating the applicability of the modelled structures for heat storage. Except that, in the paper the possibilities are discussed for the use of the source component of the diffusion equation to describe various phenomena of physical, chemical and biological nature. The present article was motivated by the observation that FVM is currently not applied in the process of designing heat storage systems.

Prefabrykowane ściany wielowarstwowe w budownictwie mieszkaniowym

Dopierała M., Stodolny Ł., Medyk A., Kaczmarek K., Szulc L., Żurkiewicz J., Putowski M.

Materiały Budowlane

2018

nr 11

11--13

Estetyka w nowoczesnej prefabrykacji betonu

Wójcik A.

Materiały Budowlane

2018

nr 11

34--35

Discretisation of thermal diffusion equation in multilayer structures with variable material parameters and different thicknesses

Sobieski W., Trykozko A.

Journal of Applied Computer Science

2018

Vol. 26, nr 2

213--240

The paper presents details of discretisation of a thermal diffusion equation in one-dimensional space in terms of the Finite Volume Method. In the following sections, the method of space discretisation is discussed along with the approximation of a spatial derivative, matrix notation of a system of equations, special cases, approximation of three types of boundary conditions and derivative approximation over time. Much attention is also given to the issue of averaging material properties which can generally be different in adjacent cells.The study aims to analyse various multilayer structures for their suitability as heat storage. The launch of studies described in the paper has been driven by the lack of methods for effective heat storage, which is currently one of the key problems faced by the renewable energy industry.

Zastosowanie komponentów energetycznych w przegrodzie wielowarstwowej

Figaszewski J.

Materiały Budowlane

2014

nr 1

12--14